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. 2020 Nov 26;15:3093–3103. doi: 10.2147/COPD.S263745

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© 2020 Ming et al.

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Study design.

Abbreviations: COPD, chronic obstructive pulmonary disease; FEV₁, forced expiratory volume in 1 second; BDP/FF, beclometasone and formoterol fixed-dose combination inhaler; FP/SAL, fluticasone propionate and salmeterol fixed-dosed combination inhaler; BUD/FF, budesonide and formoterol fixed-dose combination inhaler.